A court is obliged by law to hear any matter that falls within its jurisdiction and has no power to exercise discretion to decline hearing such matter on the ground that another court has concurrent jurisdiction. Section 169(1) of the Constitution empowers the High Court to decide matters; it does not grant discretion to decline jurisdiction. The phrase "may decide" means "is empowered to decide". The plaintiff, as dominus litis, has a substantive common law right to choose between courts of concurrent jurisdiction. This right cannot be abridged without express statutory language or a finding of unconstitutionality. Mere institution of proceedings in the High Court when Magistrates' Court jurisdiction exists does not constitute abuse of process, which requires use of court procedures for improper purposes. The High Court's inherent jurisdiction under section 173 of the Constitution cannot be used to create new legal rights, contradict existing statutory rights, or implement policy preferences; it is limited to addressing procedural lacunae that would cause injustice. Section 34 of the Constitution guarantees access to a court but does not mandate preference for particular forums or procedures where concurrent jurisdiction exists. The National Credit Act does not impliedly oust High Court jurisdiction over credit agreement matters; section 90(2)(k)(vi)(aa) of the NCA expressly recognizes concurrent jurisdiction, and where the NCA intended exclusive Magistrates' Court jurisdiction, it said so expressly.